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Figure 1
Key features of pentatricopeptide repeat proteins. (a) Schematic of the PPR motif showing two antiparallel α-helices (helix A and helix B), which are arranged in a helix–turn–helix arrangement, subsequently forming a superhelical structure. (b) Schematic representation of the domain architecture of the P-class and PLS-class subfamilies, including PLS DYW proteins and S-class PPR proteins. (c) Recognition of a single nucleotide base (G) with the fifth and 35th amino-acid residues (T and D). Hydrogen bonds are shown as dashed magenta lines.

Journal logoSTRUCTURAL BIOLOGY
COMMUNICATIONS
ISSN: 2053-230X
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